A client is admitted to the emergency department with a suspected myocardial infarction. Which laboratory test should the nurse prioritize to confirm the diagnosis?

Choice A reason: Huff coughing clears airway secretions but is less urgent than assessing oxygenation in acute dyspnea. COPD exacerbations reduce oxygen saturation, risking hypoxia. Pulse oximetry confirms the severity, guiding interventions, as coughing techniques are secondary to ensuring adequate oxygenation.

Choice B reason: Humidification prevents airway drying during oxygen therapy but does not address immediate dyspnea or hypoxia. Pulse oximetry is prioritized to assess oxygenation status in COPD exacerbation, as low oxygen levels require urgent intervention, making humidification a secondary consideration.

Choice C reason: Nebulizer treatments, like albuterol, relieve bronchospasm but require confirmation of hypoxia severity. Pulse oximetry assesses oxygen saturation, guiding whether nebulization or oxygen is needed. In acute COPD exacerbation, oxygenation status is critical to prioritize before administering treatments.

Choice D reason: Pulse oximetry measures oxygen saturation, critical in COPD exacerbation with dyspnea and tachypnea. Low saturation indicates hypoxia, guiding oxygen therapy or bronchodilator use. This objective data is the next priority after positioning, as it directs immediate interventions to prevent respiratory failure.

Choice A reason: Frequent small meals reduce gastroesophageal reflux by minimizing gastric distension, which decreases pressure on the lower esophageal sphincter. This prevents acid reflux into the esophagus, alleviating heartburn and irritation, making it an effective dietary strategy for managing GERD symptoms.

Choice B reason: Switching to decaffeinated coffee and tea may reduce reflux triggers, as caffeine relaxes the lower esophageal sphincter. However, small meals are more effective, as they directly reduce gastric volume and sphincter pressure, providing broader symptom relief than caffeine avoidance alone.

Choice C reason: Avoiding milk and cream is relevant for some GERD patients, as high-fat foods delay gastric emptying, increasing reflux. However, frequent small meals address the root cause of reflux by reducing gastric pressure, making this a more universally effective strategy than specific food avoidance.

Choice D reason: Listing high-dairy snack foods reinforces avoidance but is less direct than recommending small meals. Dairy may trigger reflux in some, but frequent small meals broadly reduce gastric distension and sphincter pressure, offering a more immediate and effective GERD management strategy.